Debugging options for the DMA engine subsystem

[mirror_ubuntu-bionic-kernel.git] / drivers / dma / Kconfig

#
# DMA engine configuration
#

menuconfig DMADEVICES
	bool "DMA Engine support"
	depends on HAS_DMA
	help
	  DMA engines can do asynchronous data transfers without
	  involving the host CPU.  Currently, this framework can be
	  used to offload memory copies in the network stack and
	  RAID operations in the MD driver.  This menu only presents
	  DMA Device drivers supported by the configured arch, it may
	  be empty in some cases.

config DMADEVICES_DEBUG
        bool "DMA Engine debugging"
        depends on DMADEVICES != n
        help
          This is an option for use by developers; most people should
          say N here.  This enables DMA engine core and driver debugging.

config DMADEVICES_VDEBUG
        bool "DMA Engine verbose debugging"
        depends on DMADEVICES_DEBUG != n
        help
          This is an option for use by developers; most people should
          say N here.  This enables deeper (more verbose) debugging of
          the DMA engine core and drivers.


if DMADEVICES

comment "DMA Devices"

config ASYNC_TX_DISABLE_CHANNEL_SWITCH
	bool

config INTEL_IOATDMA
	tristate "Intel I/OAT DMA support"
	depends on PCI && X86
	select DMA_ENGINE
	select DCA
	select ASYNC_TX_DISABLE_CHANNEL_SWITCH
	select ASYNC_TX_DISABLE_PQ_VAL_DMA
	select ASYNC_TX_DISABLE_XOR_VAL_DMA
	help
	  Enable support for the Intel(R) I/OAT DMA engine present
	  in recent Intel Xeon chipsets.

	  Say Y here if you have such a chipset.

	  If unsure, say N.

config INTEL_IOP_ADMA
	tristate "Intel IOP ADMA support"
	depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX
	select DMA_ENGINE
	help
	  Enable support for the Intel(R) IOP Series RAID engines.

config DW_DMAC
	tristate "Synopsys DesignWare AHB DMA support"
	depends on AVR32
	select DMA_ENGINE
	default y if CPU_AT32AP7000
	help
	  Support the Synopsys DesignWare AHB DMA controller.  This
	  can be integrated in chips such as the Atmel AT32ap7000.

config AT_HDMAC
	tristate "Atmel AHB DMA support"
	depends on ARCH_AT91SAM9RL || ARCH_AT91SAM9G45
	select DMA_ENGINE
	help
	  Support the Atmel AHB DMA controller.  This can be integrated in
	  chips such as the Atmel AT91SAM9RL.

config FSL_DMA
	tristate "Freescale Elo and Elo Plus DMA support"
	depends on FSL_SOC
	select DMA_ENGINE
	---help---
	  Enable support for the Freescale Elo and Elo Plus DMA controllers.
	  The Elo is the DMA controller on some 82xx and 83xx parts, and the
	  Elo Plus is the DMA controller on 85xx and 86xx parts.

config MV_XOR
	bool "Marvell XOR engine support"
	depends on PLAT_ORION
	select DMA_ENGINE
	---help---
	  Enable support for the Marvell XOR engine.

config MX3_IPU
	bool "MX3x Image Processing Unit support"
	depends on ARCH_MX3
	select DMA_ENGINE
	default y
	help
	  If you plan to use the Image Processing unit in the i.MX3x, say
	  Y here. If unsure, select Y.

config MX3_IPU_IRQS
	int "Number of dynamically mapped interrupts for IPU"
	depends on MX3_IPU
	range 2 137
	default 4
	help
	  Out of 137 interrupt sources on i.MX31 IPU only very few are used.
	  To avoid bloating the irq_desc[] array we allocate a sufficient
	  number of IRQ slots and map them dynamically to specific sources.

config TXX9_DMAC
	tristate "Toshiba TXx9 SoC DMA support"
	depends on MACH_TX49XX || MACH_TX39XX
	select DMA_ENGINE
	help
	  Support the TXx9 SoC internal DMA controller.  This can be
	  integrated in chips such as the Toshiba TX4927/38/39.

config SH_DMAE
	tristate "Renesas SuperH DMAC support"
	depends on SUPERH && SH_DMA
	depends on !SH_DMA_API
	select DMA_ENGINE
	help
	  Enable support for the Renesas SuperH DMA controllers.

config COH901318
	bool "ST-Ericsson COH901318 DMA support"
	select DMA_ENGINE
	depends on ARCH_U300
	help
	  Enable support for ST-Ericsson COH 901 318 DMA.

config AMCC_PPC440SPE_ADMA
	tristate "AMCC PPC440SPe ADMA support"
	depends on 440SPe || 440SP
	select DMA_ENGINE
	select ARCH_HAS_ASYNC_TX_FIND_CHANNEL
	help
	  Enable support for the AMCC PPC440SPe RAID engines.

config ARCH_HAS_ASYNC_TX_FIND_CHANNEL
	bool

config DMA_ENGINE
	bool

comment "DMA Clients"
	depends on DMA_ENGINE

config NET_DMA
	bool "Network: TCP receive copy offload"
	depends on DMA_ENGINE && NET
	default (INTEL_IOATDMA || FSL_DMA)
	help
	  This enables the use of DMA engines in the network stack to
	  offload receive copy-to-user operations, freeing CPU cycles.

	  Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
	  say N.

config ASYNC_TX_DMA
	bool "Async_tx: Offload support for the async_tx api"
	depends on DMA_ENGINE
	help
	  This allows the async_tx api to take advantage of offload engines for
	  memcpy, memset, xor, and raid6 p+q operations.  If your platform has
	  a dma engine that can perform raid operations and you have enabled
	  MD_RAID456 say Y.

	  If unsure, say N.

config DMATEST
	tristate "DMA Test client"
	depends on DMA_ENGINE
	help
	  Simple DMA test client. Say N unless you're debugging a
	  DMA Device driver.

endif